package exp.client.demo;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class HelloClient {

  public static String host = "127.0.0.1";
  public static int port = 7878;

  /**
   * @param args
   * @throws InterruptedException
   * @throws IOException
   */
  public static void main(String[] args) throws InterruptedException, IOException {
    EventLoopGroup group = new NioEventLoopGroup();
    try {
      Bootstrap b = new Bootstrap();
      b.group(group).channel(NioSocketChannel.class).handler(new HelloClientInitializer());

      // 连接服务端
      Channel ch = b.connect(host, port).sync().channel();

      // 控制台输入
      BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
      for (; ; ) {
        String line = in.readLine();
        if (line == null) {
          continue;
        }
        /*
         * 向服务端发送在控制台输入的文本 并用"\r\n"结尾
         * 之所以用\r\n结尾 是因为我们在handler中添加了 DelimiterBasedFrameDecoder 帧解码。
         * 这个解码器是一个根据\n符号位分隔符的解码器。所以每条消息的最后必须加上\n否则无法识别和解码
         * */
        ch.writeAndFlush(line + "\r\n");
      }
    } finally {
      // The connection is closed automatically on shutdown.
      group.shutdownGracefully();
    }
  }
}
